High-performance starch-based carbon fiber and preparation method thereof

Abstract

The invention discloses a high-performance starch-based carbon fiber and a preparation method thereof. The starch-based carbon fiber is prepared from the following raw materials in parts by weight: 50-80 parts of starch, 5-10 parts of paraffin, 1-3 parts of dehydration catalyst, cross-linking 3-8 parts of agent, 0.01-0.03 parts of biological enzyme, 10-20 parts of polyacrylonitrile, 5-10 parts of vinyl silicone oil; by introducing silicon atoms into starch-based carbon fibers, a small amount of carbon-silicon bonds are formed, so that starch-based Adjacent carbon atoms in carbon fibers are bonded by silicon atoms, which increases the force between carbon atoms, significantly improves the tensile strength and tensile modulus of starch-based carbon fibers, and is conducive to starch-based carbon fibers replacing polyacrylonitrile ( PAN)-based carbon fiber, pitch-based carbon fiber and viscose-based carbon fiber are popularized and applied in more fields.

Description

technical field [0001] The invention relates to the field of carbon fiber materials, in particular to a high-performance starch-based carbon fiber and a preparation method thereof. Background technique [0002] Carbon fiber (CF for short) is a new fiber material with high strength and high modulus with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite microcrystals along the axial direction of the fiber, and undergoing carbonization and graphitization. Carbon fiber has many excellent properties, such as high axial strength and modulus, low density, high specific performance, no creep, ultra-high temperature resistance in non-oxidizing environment, good fatigue resistance, specific heat and electrical conductivity between non-metal and Between metals, the coefficient of thermal expansion is small and has anisotropy, good corrosion resistance, good X-ray permeability, good electrical and th...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of low tensile strength and modulus in starch-based carbon fibers, and provide a starch-based carbon fiber and a preparation method thereof; the present invention forms a small amount of carbon-silicon bonds by introducing silicon atoms into starch-based carbon fibers, thereby The adjacent carbon atoms in the starch-based carbon fibers are bonded by silicon atoms, which increases the force between the carbon atoms and significantly increases the tensile strength and tensile modulus of the starch-based carbon fibers, which is conducive to the replacement of the starch-based carbon fibers by the polycarbonate. The popularization and application of acrylonitrile (PAN)-based carbon fiber, pitch-based carbon fiber and viscose-based carbon fiber in more fields